#include "kernel_operator.h"
using namespace AscendC;

#define GM_ADDR __gm__ uint8_t *__restrict__
constexpr int32_t TOTAL_LENGTH = 8 * 2048;
constexpr int32_t USE_CORE_NUM = 8;
constexpr int32_t BLOCK_LENGTH = TOTAL_LENGTH / USE_CORE_NUM;
constexpr int32_t TILE_NUM = 8;
constexpr int32_t BUFFER_NUM = 2;
constexpr int32_t TILE_LENGTH = BLOCK_LENGTH / TILE_NUM / BUFFER_NUM;

extern "C" __global__ __aicore__ void add_custom(GM_ADDR x, GM_ADDR y, GM_ADDR z)
{
  KernelAdd op;
  op.Init(x, y, z);
  op.Process();
}

class KernelAdd
{
public:
  __aicore__ inline KernelAdd() {}
  __aicore__ inline void Init(GM_ADDR x, GM_ADDR y, GM_ADDR z)
  {
    xGm.SetGlobalBuffer((__gm__ half *)x + BLOCK_LENGTH * GetBlockIdx(), BLOCK_LENGTH);
    yGm.SetGlobalBuffer((__gm__ half *)y + BLOCK_LENGTH * GetBlockIdx(), BLOCK_LENGTH);
    zGm.SetGlobalBuffer((__gm__ half *)z + BLOCK_LENGTH * GetBlockIdx(), BLOCK_LENGTH);
    pipe.InitBuffer(inQueueX, BUFFER_NUM, TILE_LENGTH * sizeof(half));
    pipe.InitBuffer(inQueueY, BUFFER_NUM, TILE_LENGTH * sizeof(half));
    pipe.InitBuffer(outQueueZ, BUFFER_NUM, TILE_LENGTH * sizeof(half));
  }

  __aicore__ inline void Process()
  {
    constexpr int32_t loopCount = TILE_NUM * BUFFER_NUM;
    for (int32_t i = 0; i < loopCount; ++i)
    {
      CopyIn(i);
      Compute(i);
      CopyOut(i);
    }
  }

private:
  __aicore__ inline void CopyIn(int32_t progress)
  {
    auto xLocal = inQueueX.AllocTensor<half>();
    auto yLocal = inQueueY.AllocTensor<half>();
    DataCopy(xLocal, xGm[progress * TILE_LENGTH], TILE_LENGTH);
    DataCopy(yLocal, yGm[progress * TILE_LENGTH], TILE_LENGTH);
    inQueueX.EnQue(xLocal);
    inQueueY.EnQue(yLocal);
  }

  __aicore__ inline void Compute(int32_t progress)
  {
    auto xLocal = inQueueX.DeQue<half>();
    auto yLocal = inQueueY.DeQue<half>();
    auto zLocal = outQueueZ.AllocTensor<half>();
    Add(zLocal, xLocal, yLocal, TILE_LENGTH);
    outQueueZ.EnQue(zLocal);
    inQueueX.FreeTensor(xLocal);
    inQueueY.FreeTensor(yLocal);
  }

  __aicore__ inline void CopyOut(int32_t progress)
  {
    auto zLocal = outQueueZ.DeQue<half>();
    DataCopy(zGm[progress * TILE_LENGTH], zLocal, TILE_LENGTH);
    outQueueZ.FreeTensor(zLocal);
  }

  TPipe pipe;
  TQue<QuePosition::VECIN, BUFFER_NUM> inQueueX, inQueueY;
  TQue<QuePosition::VECOUT, BUFFER_NUM> outQueueZ;
  GlobalTensor<half> xGm, yGm, zGm;